Pobatixn  of amebica



I p U NlTE-DQS'TATES jfga'rnpa is g lie-16,476 LPATENT "OFFICE,

IDDLE, or 'rnnn'ron, NEW JERSEY, ASSIGNOR 'ro unrmn rnonuo'rs conrom'rron or AMERICA. A COBPORATIQN or DELAWARE.

caou'rcnouc comrosrrronl m iniil brs nii'no. 1,487,487, dated December 5, 1922, Serial No. 391,173, filed July 1a, 1920.

l.1)plicat1on. for reissue filed Dec Tlre invention-aehtesto'a composition of shatter or a compoundnf the nature of rubher, gutta-percha, balata and -l1ke materials and. adapted foruse-in like manner and for 5 like purposes.

'. "Among the objects of the invention is to incorporateor. combine casein, or compositions containing'ca'sein-as an essentlal element, with g rubber,l'gutt a-pe rcha, bal ata and the. like, or

compositions thereof, the form or state in whichztliey exist as-crudeor refined latex.

1 Another jebject of the invention 1s to make a compoundorcomposition of matter of the nature aboye ment oned, made by incorporating orcombiningcasein with caoutchouc latex, which wiifiibe'adaptedfor use in various arts, asfio example, in the manufacture of.tir es,-n lt'B substitutes, flooring, billiafdgliallgbowling balls, tennis tifig, compositions pavements, household and personalp aratus and equipment,

h pers,;machi nery. parts, ebonite' and vul- 'anite com ositions,rand any other article adapted to V e made therefrom.

' By the use, of 'the term latexv herein 1s 'meant' any of the or latic feroussaps or juices Obtained from plants, more particularly those'yielding caoutchouc.

the term"caoutchouc as used in this.

osure is fmeant' rubber, gutta-percha, a5 lialata, rubber substitutes and similar sub- I ist'ances having like properties, in the form ..-'o"r stateiin which'they exlstas crude or refined latex, aswj'ell as compositionsor mixftu'res thereof. Inasmuch as these various 40 substances have essentially substantially identicalrphysical and chemical properties and are regarded as equivalents, differing only in the proportions ofres nous and proteinous matter contained therein, the may chouc.' Under the 'speci mention of rubvbar,

derstood, aso, that the samemay' be wholly. or artly in the latex formor state. 1 I f (3 term casein "s intended-to be go:

. nericto and to comprehend anyor all case nous, albuminous and protemous matters m which casein-or an'equivalent element is essential ingredient, or any mixtureor com "a rubber lilie substance such as .iiesives and coatings, wa- I '25 ts proofing compositions, gaskets, washers,

be spoken of generically b the term caout v ttaercha, am1.';ba1ata,,is,t be mg ember 4. 1924. Serial No. 758,972.

position thereof, and as may be obtained from milk, buttermilk, legumens, lentils, as .well as may be found combined and mixed with various substances such as alkalies and other chemicals to form casein glues; water, oils, glycerin, tars, resin-s, waxes and the like. The casein may be used in the pure soluble or insolublestate or in the plastic, semiplastlc, dry or powdered form as may be more convenient for the purposes desired.

Inasmuch as no two articles produced in accordance with this invention would have the ingredients thereof in exactly the same proportions it-is believed that it is nonessential to state any particular proportions of the compositions except as may be exempli' fied hereinafter. Y The important feature of the compound is the addition of casein or similar material with the rubber or rubber-like material as crude or refined latex with or without whatever other ingredients may be found-of value to make a new and useful compound. 'Among the said ingredients which have been found qf.value are filling materials, com

pounds of antimony, sulphur, lime, calciumcarbonate, 'wood pulp liquor, shellac, oils, resmous substances, ammonium-carbonate or compounds of ammonia, sodium fluoride, sodium silicate and glycerin. The casein maye dissolved and added to the various kinds of latexes. Such mix ture when subjected to heat not much above room temperatures and treated with acids andacid salts, for example, sulphuric acid or sodium acid sulphate tends to coagulate or precipitate. By mixin casein'with latex, a more eflicient and satis actory incorporating of the whole is obtained when coagulated 'or precipitated as above stated. The casein or caseinous substances, in the various forms'ee herein described, may 'be worked into the rubber materials such as rubber, gutta-percha, balata and tars, rosinand resinous matters to form a rubber substitute or substitutes particularl adapted for insulatin compounds, alata may not be as use ul due to its scarcity but when usedis of espec usein; the belting industry. a t" IThe' value of using casein in compositions of: rubber, 'gutta-percha, balata and the like* as abdve .me'ntioned lies in its insolubility undencertainlconditions and in its flexibility ioof ial i! positions.

, stances like-oils and tars. Casein or caseinous matters combine readily with lime and other chemicals which have adhesive properties and are especiall useful in a composition or compound use as waterproofing com- A waterproofing composition which has been found satisfactory in practice comprises, in proportions by weight,

i 7 Parts. Casein 100 Lime 325 Sod-'um fiuorid 8 Water 350 Latex 300 In making this composition I have found it practical first to dissolve the casein, lime an sodium fluorid in the water and then add the resulting solution to the latex. .Moreover, some of the c'ompositions'formed by my invention take very readily to vulcanizing in any of the present methods of'vulcanization wherein pure sulphur, sulphur compounds, sulphur aths and the cold sul-' hur process are usually emplo .ed. 'Vulcan- -1zation tends to harden and t us to Waterproof casein under certain conditions" of temperature and pressure,

claiin an casein, lime and s0 While I haveherein described the mode of combining certain ingredients to make a compound in accordance with my invention it is to be understood,- however, that the inventionis not limited to the particular ingredients, or the mode of treatment herein de-,

scribed, but other ingredients having substantially the same or similarcharacteristics may be employed in substantially the same of the invention andthe scope oftthe appended claims.

Havin thus described my invention, I

d" desire to protect by Letters'Patent of the United State's:

l. A composition of matter having-adhesive properties comprising a mixture u of manner without departing from the spirit caoutchouc latex and casein and an acid salt adapted'to coagulate said mixture.

.2. A composition of matter having adhesive properties comprising caoutchouc latex, caseinand'lime. v

3. 'A composition of matter having adhesive properties com rising caoutchouc latex, ium fiuorid; In witness whereof, I have hereunto set my hand this 2nd dayof December, 1924.

- ARTHUR BIDDLE. I 

